In this file photo, Facebook creator Mark Zuckerberg takes questions from members of the media. On Tuesday, May 1, 2012, Facebook launched an upgrade to its Timeline structure, which asks users to check their organ donor status and directs them to Donate Life America's National Registration Page, allowing them to designate a donation decision if they have not done so already. In an exclusive interview with ABC News' Robin Roberts on "Good Morning America" this morning, Zuckerberg announced the new initiative and became one of the first Facebook users to sign up to donate on the social network.

ATLANTA (AP) — An organ donation group says more than 100,000 people used a new Facebook feature the first day to declare they are donors.

The new option was announced Tuesday by Facebook CEO Mark Zuckerberg to boost the number of potential organ donors. It allows Facebook users to add organ donor along with other personal information on the site.

Donate Life America, the group working with Facebook, said more than 100,000 users had added their donor status by Tuesday night.

The feature also provides a link to state registries so people can officially sign up to be a donor. By Wednesday morning, 18,000 Facebook users had used the link.

But a spokeswoman said they don't know how many of those 18,000 followed through and registered.